Methods and implantable medical systems that implement exposure modes of therapy that allow for continued operation during exposure to a magnetic disturbance

US11253707B2 · kind B2 · utility

Assignee

• Medtronic, Inc. · US

Inventors

• Hyun J. Yoon · Vadnais Heights, US
• Wade M. Demmer · Coon Rapids, US
• Matthew J. Hoffman · Windom, US
• Robert A. Betzold · Fridley, US
• Jonathan D. Edmonson · Blaine, US
• Michael L. Ellingson · St. Louis Park, US
• Mark K. Erickson · Brooklyn Park, US
• Ben W. Herberg · Andover, US
• Juliana E. Pronovici · New Hope, US
• James D. Reinke · Maple Grove, US
• Todd J. Sheldon · North Oaks, US
• Paul R. Solheim · Blaine, US

Key dates

• Filing date: Oct 14, 2019
• Grant date: Feb 22, 2022
• Expiry date: Apr 29, 2040

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61N1/39622
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

Implantable medical systems enter an exposure mode of operation, either manually via a down linked programming instruction or by automatic detection by the implantable system of exposure to a magnetic disturbance. A controller then determines the appropriate exposure mode by considering various pieces of information including the device type including whether the device has defibrillation capability, pre-exposure mode of therapy including which chambers have been paced, and pre-exposure cardiac activity that is either intrinsic or paced rates. Additional considerations may include determining whether a sensed rate during the exposure mode is physiologic or artificially produced by the magnetic disturbance. When the sensed rate is physiologic, then the controller uses the sensed rate to trigger pacing and otherwise uses asynchronous pacing at a fixed rate.